Send network & security logging callbacks in foreground

Send ACTION_NETWORK_LOGS_AVAILABLE and ACTION_SECURITY_LOGS_AVAILABLE
as foreground broadcasts to reduce test time. Updated javadoc on
callbacks in DeviceAdminReceiver and DelegatedAdminReceiver.

Remove obsolete special handling of the two broadcasts above in
sendDeviceOwnerCommand(), now that they are only sent through
sendDeviceOwnerOrProfileOwnerCommand().

Bug: 183066771
Test: atest MixedManagedProfileOwnerTest#testNetworkLogging
Change-Id: I0758c0eb98be43b24cd08105a2449c349cfd4e6d